Flaming-machine



2 Sheets-Sheet 1.

(No Model.)

E. A. WALKER. PLANING MACHINE Patented May 17, 1892.

NNI

' (No Model.)

. l 2 Sheets-Skeet 2. E. A. WALKER.

PLANING MACHINE.

N0.475,o04. .Patentedmay 17,189.2.v

ne noms Penas cu., moro-muc.. wAsnmufan u c UNITED STATES VPATENT OFFICE.

EDWARD A. WALKER, OF PHILADELPHIA, PENNSYLVANIA.

PLANlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 475,004, dated May 17, 1892.

application filed April 18, 1891. Serial No. 389.422. (Novmodel.)

.T all whom it may concern:

Be it known that I, EDWARD A. WALKER, of the city and county of Philadelphia, State of Pennsylvania, have invented acertain new and useful ImprovementinPlaning-Machines,

. of which the following is a true and exact description, reference being had to the'accompanying drawings, forming a part of this specification.

My present invention relates to the mechanisms which control the feed or tool and Work presenting movements of planing-machines, and it is especially adapted for use with metal-planing machines, in which the tool is driven by being attached to a carriage that is situated upon, guided by, and moved to and fro along the bed of the machine while the work is held stationary beneath it.

The chief object of my said inventionV is to provide in the mechanism which automatically transmits feed motions to the tool-holding partof such a planing-machines carriage sys carriage with mechanism secured to the bed of the planer and adapted to impart move,-

ment to the planers feed mechanism upon the' reciprocation of the carriage aforesaid by a direct and simple gearing, and by this means to supplement and give mutual support to parts which would otherwise have to be considerably heavier, together with such further vobjects as will be apparent from this specification taken as a whole.

The new and useful features of my said present invention will be found collected in the combinations set forth in the following claims; and reference now being had to the accompanying drawings, forming part of this specification, they will be found to illustrate my said invention as follows:

Figure l is a plan View of a planing-ma chine provided with my improveddevice in its preferred form; Fig. 2, an end view of a fragment of the main portion of the machine shown in Fig. l. Fig. 3 is a cross-sectional viewon the line 1 2 of Fig. l. Fig. 4 is a side elevation of a portion of the machine. Fig. 5 is a cross-sectional view upon the line 3 4 of Fig. 3. Fig. 6 is a cross-sectional view upon the line' 6 of Fig. 3. Fig. 7 is a cross-sectional view upon a somewhat smaller scale of a modification of a fragment of the structure illustrated in Fig. 3; and Fig. 8 is a cross-sectional view of al further modification of the structure shown in Fig. 3.

Inggeneral A is the bed of the planer, d a its guideways, and Ba carriage having a suitably recessed foot B', wherebyit is supported upon, guided by, and movable along the top of the bed aforesaid.

C is a screw, which, being journaled without end movement to the bed of the machine, engages the carriage B by meansof. a nut or nuts, (not shown in the drawings,) and thereby upon its rotation in opposite` directions imparts reciprocal movement to thel carriage B along the bed aforesaid. To effect such rotation in the screw, the machine is in this inin their position by means of a shipper-slide. I n., viz: The shipper-slide n, passing between the pivotal supports of the said arms m and being attached to and guided by the bracket Y', (secured to the rear of the bed A,) has formed upon its sides projections n n2, which projections are adapted to bear upon the horns of crescent-shaped lugs m2 m2, that are xed to and vibrate with the said arms m m. By this contrivance it will be readily understood that when the shipper-slide n is moved endwise the belt-shifter armi aforesaid are concurrently and correspondingly vibrated. Now to determine a proper length of such endwise movement, so as to pass the belts to and fro off the fast and `loose pulleys and to do it with convenience to the machinist operating the planer I have in this instance shown a throw-rod W, which, being bolted near the bracket Y' to the inner end of the shipperslide n, thence extends over both the bed and carriage of the planer to the bracket Y, through which it passes in a suitable manner forv endwise movement without rotation, as denoted by its rectangular section in Fig. 2, and while the mechanisrnwhich Iprefer to use' for imparting endwise motion to this throwrod NV by-itself forms no part of my present invention `and has latelybeen described by me in an application tiled October l, 1890, Serial No. 366,776, I willhere state that it consists of formi-ng on or rigidly securing to -saidf throw-rod a toothed rack-workin', the length of which is preferably slightly in excess of the-maximum range` of the carriage B along the gnideways of the bed,'andwhose position is such that its rack-work engages with the pinion U, rotatably vmounted upon a journal, such as `the main 'tool-holder feed-shaftK, which is in its turn rotatably mounted upon the planers carriage B. The said pinion U being rigidly attached to a sleeve S, which, enveloping the shaftK aforesaid,extends across the same'inthe vpreferred construction-to a position most convenient to the operator, is there provided with ahand-wheel S', by means of which the operatorcamas described in my aforesaid application, manually control the length .of the carriages to-and-fro strokes independent of its ordinary automatic reversing devices which in this instance areillustrated by the T shaped slot w, fashioned in the side of the lthrow-rod W, the adjustable flange-headed studs o2, stops 'u fu', and abutment-bolt'V, which, as shown inv Fig. 1,is attached tothe top of the carriage B. i

the tool-holder of the planer. G and H (seeFig. A4) are shafts connecting with said holder and by which a proper transverse and vertical feed is effected. However, as the particular mechanism for moving the tool-holder forms no part ofmy present invention,l have not thought it necessaryto illustrate it further than by thus `identifying -the shafts G and H in the drawings. The Shaft G is driven from-the shaft H by means of pinions g and h, secured, respectively, to the said shafts. The shaft H is actuated by the lever h2, which isjournaled on the shaft and to which are pivoted pawls h3 ha, which engage in ratchets h', that are secured to the shaft H. -By this construction, which is `also a familiar one, the shaft H is turned when the'lever h2 movesin one direction,fwhile the pawls move-freely over the face of the ratchets without turning the shaftwhen the lever moves in the opposite direction, and contrariwise when the 4pawls are reversed. A reciprocating' movement is given to the lever h2 by means of the connecting-rod I, the other end of which rod is ad justably fastened in a slotted arm J which is secured upon the end of the shaft K aforesaid, which shaft, being journaled without end motion to the brackets b b', that are formed integrally with or rigidly. secured to the carriage B, extends across said carriage in a horizontal position and carries upon it not only the hand-wheel S', sleeve S, and the shipper-rod intermeshing gearV U aforesaid, but also in close proximity to said gear another pinion M. Eachpinion, being mounted loosely upon the shaft K, is operative to actuate said shaft as follows, viz: On each side of the preferably Aflat side faces of the said pinion M,I place correspondingly-faced frictionplates L and L', the said plates beingattached to the said shaft K in such manner. thatwhile both turn with it one of .them (the one marked L in the drawings) is fixed (see the throughbolt Z4, Fig. 3) and the other of them (L' of Figs. 1 and 3) made longitudinally. movable along the shaft K; and, for the purpose of steadying it in this movement-the movable plate L is preferably provided with asleeve Z, which, having a suitable seat, engages the key 7a2-fixed to shaft K, and also bushes the journal is providedwth a screw-thread k2, upon which I mount a nut k', and between this-nutand the back of the bushngZ I locate af spiral spring N, by means of which I conveniently contrive that the side faces of the pinion M shall be clamped with resilient pressure between the adjoining side faces of the fixed and movable clamps L L'. In order to impart rotary motion-to the vpinion M, I attach, as by bolting to the offsets y y of the support Y' and the bracket Y,-respectively, the straighttoothed rack R, for it will be obvious that when the carriage B is reciprocated by the screw C the pinion M, meshing with therack R, will be rotated back and forth, ,and that under the clamping action of the plates L L', urged by the spring N, the said plates will, by means of the bolt Z4 and key 104, be efficient to impart corresponding rotary motion to the shaft K, which carries the slotted head J, that actuates the feed-shafts H and G 'through' the medium of the linkage I h2, (hc. In order .to limit the throwV ofthe shaft Kat each reciprovcation of the carriage B to less than a full` Beyond the bushing Z the shaftK IOO with these abutments I locate at a suitabley range a relatively-fixed stop, such as the endwise-adjustable bar O, which, being inserted in a suitable orifice in the bracket Miscon- -veniently clamped thereto by a binding-screw 02 in suchmanner that its end 0' may project within the range of the clamp-stops aforesaid. In short, as the traveling carriage B is driven back and forth along the bed Athe rack R serves to rotate reciprocally the pinion M. Thereupon the frictional contact between the sides of said pinion and those of the clamps L L causes the said parts to act as a clutch, and thereby and at the beginning pf each stroke of the carriage B aforesaid imparts rotary motion to the shaft K, Which motion of said shaft, bein ginterrupted by the stop mechanism aforesaid-wiz., parts designated O I o-is limited to the initial part only of each stroke forward or backward of the carriage, and a rocking motion of the desired sort is thus imparted at those moments to the slotted arm J, which arm, being fixed, as above mentioned, to shaft K, thence through rod I, transmits motions as feed movements to the lever h2 aforesaid. Y

In Fig. l I have shown a bracket kg and the step-screw kw, adapted to take the thrust of the shaft K endwise in its bearings in the brackets Z) b. This enables me to make the bearing of the shaft Kin the bracket b without a neck or collars, which I deem an advantageous construction. Referring to Fig. 3 it will also be seen that the gear U, as there illustrated, when viewed in section shows a chambered or overhanging form by which the fixed clamp L of the clutch is conveniently andcompactly housed. The gear U, being mounted upon the sleeve S, is fixed thereto by a set-screw s. l

In Fig. 8 I have shown the stop Z', which limits the motion of the shaft K, secured directly to that shaft and not carried by the friction plates, which serve to clamp said shaft with resilient pressure to the intermediate pinion M. In order to afford the stops when thus carried by the shaft a convenient abutment, I have shown in Fig. 8 the adjustable bar O with its rear part retreated within range of said stop or stops.

In Fig. '7 the modification consists in mounting the pinion M upon abushing M', through which a keyway is fashioned. By this means the clamping-plates of the clutch, which here, being ofa somewhat modified form, I designate as L10 L, are secured to the shaft K by a preferably continuous key Z, that is adapted to pass through seats that are fashioned for it in both of them, the shaft K and the bushing M' aforesaid. This construction I prefer for the reason of its simplicity, coupled with the fact that the bushing may be made of antifriction metal, and so reduce the wear entailed by the constant rotation of the pinion M when the carriage is reciprocated. The key Z in this modification, instead of being continuous, may, as indicated by broken lines adjoining the contact-faces of the clamps and pinion M, be interrupted and formed in three sections, should that be found desirable.

In conclusion, as the T-shaped slottin g and considerable length of the throw rod Vtends to weaken it I preferably take advantage of the close association and parallel alignment with itof the clutch-rod R and combine said rod and rack for mutual support. This is illustrated in Figs. l and 3, Where the clips or lugs r, having an L-shaped section, are bolted to the tops of the throW-rodWand-by bearing upon the top and outer face of the rack R afford supports to the th row-rod Without hinderance to its endwise movement. The rodv thus supported also tends to stiften the rack from being bent laterally. It Will also be .borne in mind that I limit my present invention, so far as the same refers to the clutch mechanism of the tool-feed, to one Where the intermediate and driving member thereof is not adapted to be relieved from the stress of its clamping members, the frictional contact being in this case contrived to be overcome upon the positive abutment of the stops and not relieved by the retraction of the resilient clamps, as was described and claimed by me in my patent, No. 454,960, of June 30, 1891.

Having now described my invention, what I claim as new, and desire to sec-ureby Letters Patent, is-

l. In a planer, the combination, With the tool-carrying carriage, of the feed-shaft K, a gear-Wheel M, journal'ed` thereon, frictionplates fixed radially to shaft K and arranged to clasp Wheel M between them with resilient pressure,astop or stops connected with shaft -1 K, another stop or stops attached to some relativelyfixed part of the machine and arranged to engage the stop or stops aforesaid and arrestthe motion of shaft K,but Without :relaxing the pressure of the plates aforesaid upon Wheel M, and a stationary rack R, directly engaged With the-gear M, so as to rotate it as the carriage aforesaid moves over the bed of the planer, substantially as and for the purpose described.

2. In a planing-machine havinga fixed bed, as A,a movable tool-carrying carriage, as B, and mechanism for feeding the tool and reciprocating the carriage, as described, the combination of a sliding` shifter-bar W for controlling said reciprocating mechanism, a fixed rack R, the said shifter-'bar and rack being suspended contiguously above said bed, as by brackets YY', and adapted to mutually support each other, as by clips r, and a pinion, as M, operatively connected With said rack and operative to impart motion to said feed mechanism upon the reciprocation of said carriage, substantially as and for the purposes hereinbefore described.

3. In a planing-machine having a fixed bed, as A, a movable tool-carrying carriage, as B, and mechanism for feeding the tool and reciprocating the carriage, as described, the combination of a slide shifter-bar, as W, provided with rackfwork of alength as described,- a fixed rack R, the said shifter-bar and fixed rack being above said bed, a pinion M, rotatably journaled upon a main feed -motion drive-shaft K, said pinion being so located thereon as to mesh its teeth with the fixed rack R aforesaid, the said shaft K, a gear U; and hand-wheel S', rigidly fixed together, as

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operative to limit said shafts rotative move` ment to a limited degree, and means, as crossd head J, link I, rock-arm .712, pawl 71,3, and a ratchet h', for transmitting the rocking movement of the shaft K to said feed mechanism 15 of the planer, substantially as and for the purpose specified. v

`EDWARD A. WALKER. Vitnesses:

GEORGE HoUsE, H. W. HABE POWELL. 

